Quick answers
- Where does David M. Fastenberg see patients?
- Medicare's clinician data lists 2 practice locations, including Hauppauge, NY and Great Neck, NY. Call before your visit to confirm the address.
- What is David M. Fastenberg's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does David M. Fastenberg accept Medicare assignment?
- Yes. Medicare's clinician data says David M. Fastenberg accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for David M. Fastenberg?
- (631) 234-5666, as listed in official Medicare / NPI Registry data.
- What is David M. Fastenberg's NPI number?
- 1336252626. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where David M. Fastenberg is enrolled with Medicare (CMS data updated 2026-10-02).
- 200 Motor PkwyHauppauge, NY 11788 (631) 234‑5666
- 600 Northern BlvdGreat Neck, NY 11021 (516) 466‑0390
Group practices
Medicare enrollment lists David M. Fastenberg as a member of this group (CMS data updated 2026-10-02).
- Long Island Vitreo Retinal Consultants PC20 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Hauppauge
Clinicians with the same Medicare primary specialty in Hauppauge, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1976 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336252626 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians